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Finding the Fourth Proportional to 1,655.88, 2,285.01 and 909.87

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Solution

The fourth proportional to 1,655.88, 2,285.01 and 909.87 is: 1,255.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,655.88 : 2,285.01 = 909.87 : x
  2. Step 2: Convert to fraction form
    1,655.88/2,285.01 = 909.87/x
  3. Step 3: Cross multiply
    1,655.88x = 2,285.01 × 909.87
  4. Step 4: Simplify right side
    1,655.88x = 2,079,067.21
  5. Step 5: Solve for x
    x = 2,079,067.21/1,655.88
  6. Step 6: Final answer
    x = 1,255.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.